tandel



Jan. 2s, 1927. 1,615,415'

` F. TANDEI. FABRIC FEEDING API-ARANTUSV Filed $9111.24', 1923 :ssheets-Sheet 1 Jan. 1

25 927 F.1ANDEL FABRIC FEEDING APPARATUS Filed Sept.' 24. 1923 3Sheets-$11661; E

w 0g. i? @www /.a WV u a f/ WwM/M 4 w 15 pipes A and a part of the pipescontrolle FRITZ TANDEL, CHEMNITZ, GERMANY,

CHEMNITZ, SAXONY, GERMANY,

1,615,415 PATENT OFFICE.

ASSIGNOR T C. G. HAUBOLD, A. G., 0F A CORPORATION 0F GERMANY.

FABRIC-FEEDING APPARATUS.

Application led September 24, 1923, Serial No. 664,446, and in GermanyOctober 24, 1922.

Myvinvention relates to improvements in fabric feeding apparatus, andmore particularly in apparatus of the type comprising a feeler incontact with one of the margins of the fabric and adapted to operatepneumatic means for regulating the web feeding mechanism if the web orfabric moves to the side and out of its regular path. The object of theimprovements is to provide an apparatus which is simple in constructionand sensitive in operation, and with this object irl vievs7 my inventionconsists in providing the feeler with a member formed with passagesdirectlycontrolling the fluid supply to an apparatus operating theregulating mechanism of thecloth feeding apl paratus.

For the purpose of explaining the invention an example embodying thesame has b'een shown in the accompanying drawings,

in which the same reference characters have been used in al1 the viewsto indicate corresponding parts. In said drawings- Fig. 1, is anelevation showing a part of a fabric feeding apparatus,

Fig. 2, is an elevation seen from the left in Fig. 1, l

Fig. 3, is a detail view showin the feeler thereby, Fig. 4 is anelevation seen from the right in Fig. 3f, and

Figs. 5 and 6, show respectively the cooperating faces of the feeler andthe block connected with the iiuid supplying pipes.

Figure 7 is a sectional view through a pneumatic motor which may be usedin the apparatus.

For explaining the invention I have shown the same as used in a fabricfeeding apparatus of known construction shown diagrammatically in Figs.1 and 2, and comprising a guide arm 6 for the fabric mounted for rockingabout a vertical pivot 7 and guided at lts bottom on a rail 8, a roller9 being provided on the arm 6 rail 8 is disposed on a pair of uprights23 having a bracket 10 secured thereto, which bracket provides aysupport for a screwthreaded spindle 11 screwing in apart of the arm 6for rocking the same in one or the other' direction. To the spindle 11 asprocket gearing 12 is keyed which is connected by a chain 13 with asprocket gearing 14 mounted on a rockable frame 15 and having a spurgearing 16 keyed to its spindle 17. The

to reduce friction. The

frame 15 is connected with a pneumatic cylinder 18 having a supply ofpressure to Opposite ends and enclosing a piston the rod 19 of which issecured at opposite ends to relatively fixed eyes 20, springs 21 beininterposed between the eyes and the end aces of the cylinder 18 fornormally holding thecylinder in its median position. By admittingpressure fluid to one or the' other end of the cylinder 18 the frame15=is rocked either to the right or left. Thereby the spur gearing 16 isthrown into engagement with either one of'spur gears 22 rotating inopposite directions, so that the spur gearing 16 and the` spindle 11 arerotated either to the right or left and the arm 6 is rocked accordingly.Pressure or suction fluid is supplied to the cylinder 18 through pipes dand caccordinr as positive or negative pressure'is employe So far themechanism is known in the art and the brief description will besuiicient to give a clear understanding to those skilled' in the art.. Iwish it to be understood that the mechanism has been described by way ofexample in order-that the controlling mechanism now to b'e described maybe clearly understood.

The controlling mechanism is shown in detail in Figs.`3 to 6. Itcomprises a block lc formed with bores z', Z, and m. The bore z"communicates through a pipe b with the pressure fiuid supply 24, andthebores Z and m communicate respectively through the pipes c and d withthev opposite ends of the cylinder 18. Below the block the feeler L 90is mounted between point bearings O, and it forms a part of a block 'a.The top face of the block a and the bottom face of the block k arecylindrical in form, the axis of the cylinder coinciding with that ofthe point bearings O, O, and the said faces are slightly spaced fromeach other in order to avoid friction of the parts moving relatively toeach other. The block a is provided at its top face with two grooves eand f spaced .160 from each other and extending from they middle of theface to opposite sides and adapted to establish communication betweenthe medianbore i and the outer bores Z and m respectively. The relativepositions of 105 lows; As long as the fabric g travels in the correctway the feeler b is in the median position shown in Fig. 4 in whichthe|bore 'i and the supply pipe are disconnected from both bores Z, mand pipes c, d, the bottom end of the bore i being located between thegrooves e and f. If now the web g is moved out of its regular path, say.to the left in Fig. 4, the feeler l1, is rocked to the left and theblock a to the right, so that the groove e establishes communicationbetween the bores l and i. Therefore pressure fluid is admitted to theright hand end of the cylinder 18, and the regulating mechanism isoperated in the manner known in the art.. until the fabric is again incorrect position. Thereby the feeler a, h is returned into the positionshown in the figures in which none of the pipes c and d communicate withthe pressure fluid supply.

Figure 7 shows a longitudinal. section through the cylinder 18. It willbe observed from this view that the hollow piston rods 19 whichcommunicate respectively with conduits d and chave the channels d1, c1thereof, opening through ports d2 and c2 into the cylinder. W'henpressure is applied through conduit (l, cylinder 18 moves to the leftagainst the tension of spring 21, the air compressed in the space at theri 'ht of piston 181 escaping throufrh `the stu g box on this side. Thecylinder may be provided with opening 184 and the piston with aprons185, 186 in order to relieve the pressure after the gears have beenproperly engaged. Of course, when pressure is applied through theconduit c, channel c1 and ports c, the'cylinder 18 will move to the righave been uncovered by the piston.

I claim:

1. In a web feeding apparatus, web feeding mechanism, regulatmg meanstherefor adapted to maintain the web in side register, comprisingoperating means adapted to be operated by fluid pressure and valve meanscontrolling the supply of fluid pressure to said operating meanscomprising a block formed with a plurality of ports opening through oneface thereof and a relatively movable member formed with recessesadapted to connect certain of said ports when moved in one directionfrom a normal position and to connect certain other of said ports whenmoved in the opposite direction, said blockand member having a slightclearance therebetween whereby friction is eliminated, and means engagedby the web for moving said movable member in one direction or the otheraccording as the web deviates from one side to the other of saidpredetermined path.

2. In a web feeding a paratus, web feeding mechanism, regulatmg meanstherefor adapted to maint-ain the web in side register comprisingoperating means adapted to be operated by fluid pressure and means con-Y t until the openings 184 trolling the supply of fluid pressure to saidoperating means comprising a block having a lowerl cylindrically curvedface and formed with three aligned conduits, the centralone of whichcommunicates with a source of fluid pressure and the two lateral ones ofwhich communicate with said operating means and a pivoted member havinga curved face opposed to the curved face of said block, there being aslight clearance between said faces, said pivoted member being formedwith recesses in its curved face adapted to place` the source of fluidpressure in communication with one or the other of said lateral conduitsaccording as said pivoted member is moved to one side or the other of anormal position, said .pi-voted lmember having a depending arm adaptedto engage the edge of the web.

3. In apparatus of the kind described, web feeding mechanism, regulatingmeans therefor adaptedA to maintain theI web in side register,comprising fluid pressure operated means, and valve means controllingthe supply of fluid pressure to said means comprising a block formedwith a plurality of ports opening through one face thereof and arelatively movable member formed with a recess adapted to connectcertain of said ports when moved in 011ev direction from its normalposition, said block and member having a slight clearance therebetween,and means engaged by the web forf moving said movable member when theweb deviates fromsaid predetermined path.

4. Inapparatusof the kind described, web feeding mechanism, regulatingmeans therefor adapted to maintain the web in side registercomprisingiluid pressure operated means and valve means controlling thesupply of fluid pressure to said operating means comprisin a blockformed with a segmental cylin rically curved face and having a pluralityof ports opening at said curved face, and a pivoted feeler adapted to beengaged and operated by said web and having a curved face formed thereinwith recesses adapted to connect certain of said ports when the feeleris operated in one direction and certain other of said ports whenoperated in the other direction, there being a slight clearance betweenthe curved faces of sa1d block and feeler.

5. In apparatus of the` kind described, web feeding mechanism,regulating means therefor adapted to maintain the web in side registercomprising fluid pressure operated means and valve means controlling thesupply of fluid pressure to said operating means comprising a blockformed with a segmental curved-face and havinr a plurality of portsopening at said curved a pivoted feeler adapted to be engaged andoperated by said web and having a segmental curved face formed thereinwith recesses adapted to connect certain of said face, and

ports when the feeler is operated in one direction and certain other ofs'aid ports when operated in the other direction, there being a slightclearance between the curved faces of said block and feeler.

6. In a web feeding apparatus, the combination, with the feedingmechanism, and regulating means therefor adapted to hold the web in sideregister and comprising operating means adapted to be operated bypressure fluid in one or the other direction, of a pressure fluidsupply, two 'tubulaimembers connected with said operating means forsupplying pressure fluid thereto for operation of the regulating meansin one or the other direction, a fluid supply, a

block having ports communicating with said Huid supply and tubularmembers, a rockable feeleradapted for engagement with the fabric beingfed, said block and feeler having' cylindrical faces concentricrela-tively `to the fulcrum of the feeler,.said .ports opening throughsaid faces, and said feeler be- Iing formed with passages adapted toconnect said fluid supply with eitherone of said tubular members.

7. In a web feeding apparatus, the combination, withthe feedingmechanism, and

Y said conduits is supplied with fluid pressure,

a fluid supply, a block having ports'communicating with said fluid suppland conduits, a rockable feeler adapted or engagement with the fabricbeing fed, said block and feeler having spaced cylindrical facesconcentric relatively vto the fulcrum of the' feeler, said orts openingthrough said faces, and said feeler being formed with passages adaptedto connect said fluid supply 'with either one of said conduits.

In testimony signature.

FRITZ TANDL.

whereof I hereunto aflix my-l

